From 1c37fa0fce36549bd6c939d3a9a4ad149d262a86 Mon Sep 17 00:00:00 2001
From: Siana Gearz <siana.sg@live.de>
Date: Sat, 13 Nov 2010 05:39:09 +0100
Subject: [PATCH] Cache purge queue

---
 indra/newview/lltexturecache.cpp | 54 ++++++++++++++++++++++++++++++--
 indra/newview/lltexturecache.h   |  4 +++
 2 files changed, 55 insertions(+), 3 deletions(-)

diff --git a/indra/newview/lltexturecache.cpp b/indra/newview/lltexturecache.cpp
index ed802aeb1..5744fe54f 100644
--- a/indra/newview/lltexturecache.cpp
+++ b/indra/newview/lltexturecache.cpp
@@ -746,6 +746,7 @@ LLTextureCache::LLTextureCache(bool threaded)
 
 LLTextureCache::~LLTextureCache()
 {
+ 	purgeTextureFilesTimeSliced(TRUE); // VWR-3878 - NB - force-flush all pending file deletes
 }
 
 //////////////////////////////////////////////////////////////////////////////
@@ -1384,8 +1385,7 @@ void LLTextureCache::purgeTextures(bool validate)
 		if (purge_entry)
 		{
 			purge_count++;
-	 		LL_DEBUGS("TextureCache") << "PURGING: " << filename << LL_ENDL;
-			LLAPRFile::remove(filename);
+			mFilesToDelete.push_back(filename);
 			cache_size -= entries[idx].mBodySize;
 			mTexturesSizeTotal -= entries[idx].mBodySize;
 			entries[idx].mBodySize = 0;
@@ -1393,6 +1393,8 @@ void LLTextureCache::purgeTextures(bool validate)
 		}
 	}
 
+	mTimeLastFileDelete.reset();
+
 	LL_DEBUGS("TextureCache") << "TEXTURE CACHE: Writing Entries: " << num_entries << LL_ENDL;
 
 	writeEntriesAndClose(entries);
@@ -1406,10 +1408,53 @@ void LLTextureCache::purgeTextures(bool validate)
 	LL_INFOS("TextureCache") << "TEXTURE CACHE:"
 			<< " PURGED: " << purge_count
 			<< " ENTRIES: " << num_entries
-			<< " CACHE SIZE: " << mTexturesSizeTotal / 1024*1024 << " MB"
+			<< " CACHE SIZE: " << mTexturesSizeTotal / 1024 / 1024 << " MB"
 			<< llendl;
 }
 
+void LLTextureCache::purgeTextureFilesTimeSliced(BOOL force_all)
+{
+	LLMutexLock lock(&mHeaderMutex);
+
+	F32 delay_between_passes = 1.0f; // seconds
+	F32 max_time_per_pass = 0.1f; // seconds
+
+	if (!force_all && mTimeLastFileDelete.getElapsedTimeF32() <= delay_between_passes) 
+	{
+		return;
+	}
+
+	LLTimer timer;
+	S32 howmany = 0;
+
+	if (!mFilesToDelete.empty())
+	{
+		LL_INFOS("TEXTURE CACHE") << "purging time sliced with " << mFilesToDelete.size() << " files scheduled for deletion" << llendl;
+
+		for (LLTextureCache::filename_list_t::iterator iter = mFilesToDelete.begin(); iter!=mFilesToDelete.end(); ) 
+		{	
+			LLTextureCache::filename_list_t::iterator iter2 = iter++;
+			LLAPRFile::remove(*iter2);
+			mFilesToDelete.erase(iter2);
+			howmany++;
+
+			if (!force_all && timer.getElapsedTimeF32() > max_time_per_pass) 
+			{
+				break;
+			}
+		}
+	}
+
+	if (!mFilesToDelete.empty())
+	{
+		LL_INFOS("TEXTURE CACHE") << "purging time sliced with " << howmany << " files deleted (" 
+				<< mFilesToDelete.size() << " files left for next pass)" 
+			<< llendl;
+	}
+
+	mTimeLastFileDelete.reset();
+}
+
 //////////////////////////////////////////////////////////////////////////////
 
 // call lockWorkers() first!
@@ -1561,6 +1606,9 @@ LLTextureCache::handle_t LLTextureCache::writeToCache(const LLUUID& id, U32 prio
 		purgeTextures(false);
 		mDoPurge = FALSE;
 	}
+
+	purgeTextureFilesTimeSliced();	// VWR-3878 - NB - purge textures from cache in a non-hiccup-way
+
 	LLMutexLock lock(&mWorkersMutex);
 	LLTextureCacheWorker* worker = new LLTextureCacheRemoteWorker(this, priority, id,
 																  data, datasize, 0,
diff --git a/indra/newview/lltexturecache.h b/indra/newview/lltexturecache.h
index 45804c26b..9f89ecda8 100644
--- a/indra/newview/lltexturecache.h
+++ b/indra/newview/lltexturecache.h
@@ -147,6 +147,7 @@ private:
 	void readHeaderCache();
 	void purgeAllTextures(bool purge_directories);
 	void purgeTextures(bool validate);
+	void purgeTextureFilesTimeSliced(BOOL force_all = FALSE);	// VWR-3878 - NB
 	LLAPRFile* openHeaderEntriesFile(bool readonly, S32 offset);
 	void closeHeaderEntriesFile();
 	void readEntriesHeader();
@@ -176,6 +177,9 @@ private:
 	typedef std::vector<std::pair<LLPointer<Responder>, bool> > responder_list_t;
 	responder_list_t mCompletedList;
 	
+	typedef std::list<std::string> filename_list_t;
+	filename_list_t	mFilesToDelete;
+	LLTimer mTimeLastFileDelete;
 	BOOL mReadOnly;
 	
 	// HEADERS (Include first mip)